If you dissolve 23 g of ammonium chloride in 500.0 mL of water, what is the molar concentration of the solution?

Molar concentration is the amount of solute in moles divided by 1 liter of solvent. Then to answer this question, you need to convert the 23g of ammonium chloride into mole unit. Since the mass of nitrogen = 14, helium = 1, and chlor = 35.453 then the molecular mass of (NH4) Cl should be: 14+4+35.453 = 53.5

Then, the molarity should be: 23g / (53.5gr/mole) / (500ml/1000ml) = 0.86molality